Chemistry 2.1.2 Atomic structure

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  • Created by: AabirA
  • Created on: 03-04-17 12:48
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  • Atomic structure
    • Nucleus
      • Contains protons and neurtons
        • Protons have a positive charge
          • Both have the same mass
            • Neutrons have no charge
              • Contains protons and neurtons
                • Protons have a positive charge
                  • Both have the same mass
                    • Neutrons have no charge
        • Found at the centre of an atom
        • Extremely dense, accounts for almost all of the atom's mass
        • Only a small volume
      • Electrons
        • Electrons orbit the nucleus in shells
        • They have a negative charge
        • An electron is 1/2000 the relative mass of a proton or neutron
      • Isotopes
        • Atoms of the same element with different numbers of neutrons
          • Same number of protons and electrons
        • An element's mass number is based of the relative abundance of its isotopes
        • Different isotopes of the same element react in the same way
          • Neutrons don't effect chemical reactivity
      • Ions
        • A neutral atom has the same number of electrons as porotons
        • Losing or gaining electrons
          • To become stable
          • Unbalanced numbers of electrons and protons
            • Charges don't cancel out
      • Most of the volume of an atom consists of the empty space between the nucleus and shells
        • Nucleus
          • Found at the centre of an atom
          • Extremely dense, accounts for almost all of the atom's mass
          • Only a small volume
        • Electrons
          • Electrons orbit the nucleus in shells
          • They have a negative charge
          • An electron is 1/2000 the relative mass of a proton or neutron

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